perf(orchestrator): prefetch human-phase opinions and tighten context budget

perf(orchestrator): parallel phases, streaming, early table summaries

feat(resilience): multi-tier participant failure recovery + Response-priority toggle

Tighten CCAI conversation flow and visual threading

Build CCAI Vibe Demo on top of LLMChats3 baseline

Import LLMChats3 master as CCAI baseline